Mechanical movement



C. F. HOVER.

MECHANICAL MOVEMENT.

APPLICATION FILED .IUNE30, 1919.

Patented Sept. 7, 1920.

' To all whom it may concern UNITED STATES. 4

Specification of Letters Patent.

ME HANICAL MOVEMENT.

Application filed June 30, 1919. 'Serial No. 307,657.

Be itknown -that I CHARLEs F. Hovnn, a citizen of the United tates,residing at Conrad, in the county of Teton, State of Montana, haveinvented certain new anduseful Improvements in'. Mechanical Movements;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to new and useful lmprovements 1n drivingmechamsms and particularly to mechanisms for converting rotary intoreciprocatory movements.

One object of the present invention is to provide a novel and improveddevice of this character wherein the reciprocating part is preventedfrom being injured by knocking at .the ends of its stroke.

Another object is to provide a novel and improved device of thischaracter which is disposed to run in oil, whereby the movements of theparts will be smooth and without friction. I. k

Other objects and'advantages will be apparent from the followingdescription when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a vertical longitudinal sectional view through casingwhichcontains the mechanism, the parts of the mechanism being showninside elevation.

Fig. 2 is a vertical transverse sectional view taken on the line 2--2 ofFig. 1, looking in the direction of the rotarymember, to

show the relative position of the parts and the ball bearings for saidrotary member.

Fig. 3 isa horizontalsectional view taken on the line 3-3 of Fig. 2,showing the guiding means for the reciprocating member and the buffertherefor. Q

Fig. 4 is-an enlarged detail sectional view showing the roller 12 andits mountings.

Fig. 5- is a horizontal sectional view taken on the line 55 of Fig. 4.

Referring particularly to the accompanying drawing, 10 representsthelower portion, and 11 the upper portion of an oil-tight casing. In oneend of the lower portion 10 there is formed an opening 12 through whichthe cylindrical portion '13 of the bar 14 is slidably disposed, suitablepacking 1a, and a 010-".

sure plug .6 being engaged-in said opening,

for the purpose of preventing escape of oil from the casing. The upperportion is secured, detachably, to the lower portion by the bolts 17. Inthe upper wall of the portion 11 there is formed a filling opening 18 inwhich is engaged a closure plug 19, and through this opening the casingis filled with Patented Sept. 7, 1920.

oil. The greater portion of the bar 14 is flat,

as 'shown,.and is disposed in a longitudinal groove 20, formed in thebottom wall of the lower portion of the casing. Secured to the bottomwall of the casing, and extending .vertically in longitudinal alinement,are the two bearing brackets 21 which rotatably support the longitudinalshaft 22. Oneend of this shaft extends through one end of the casing andhas secured thereon a sprocket wheel 23. 'The inner faces of theupperends of the bearing brackets, as well as the adj acent end faces ofthe cylindrical member 24, which is secured on the shaft, between saidbrackets, are formed'with ball races 25 in which are disposed thecircular series of ball bearings 26, to take up the end thrust of themember 24. In the peripheral face, of the member 24 there is formed anendless cam groove 27 for the reception of the roller 28 which iscarried by the vertical pin 28' secured in the up er face of the fiatportion of the bar 14. urrounding this pin, and within the roller, arethe. antifriction bearing rollers 29. It will be noted that the feet ofthe brackets 21 are disposed across the groove 20 so that said bracketsact'as guides and retainers for the bar to prevent upward movementthereof from said groove. Formed in the bottom of the casing, andextending laterally away from the groove20, are the small grooves orchannels 30, and slidably disposed in each of these channels is a block31 carrying on its inner end a roller 32 which bears againstthe side.face of the flat portion of the bar 14. Each of these blocks islongitudinally slotted, as at 33 to receive a screw 34 which is engagedin the bottom of the channel 30, and by means of which the blocks maybeadjusted and held in different positions toward and away from the bar14.

The portion of the bar 14, which is disposedoutwardly of the casing, isprovided with a ball head 35 for engagement with one end of a sickle barof a mowing machine, or the like, not shown. At one end of the casingthere is mounted a bufier spring 36 against which the end of the flatportion of the bar 14jat one end oi the stroke thereof,

while a similar spring 37 is disposed at the. other end of the casingfor abutting engage-; ment by the vertical in 38 carried by the innerend portion of t e cylindrical part of the said bar; Thus jar and shockare absorbed at each .end

' of the bar 14.

' *Whatis claimedis: 4

. Comof the stroke of the It will thus be seen that when the shaft 22 iscontinuously rotated the cylindrical member will cause the bar 14 toreciprocate longitudinall in the cove 20, so that at .one end of t estroke thereof it will abut against the. spring 36, and at the other endthestroke the pin 38 will abut against the 37 thereby avoiding knockingsoun and preventing shocks and ,j'ars.

-The cam grooves walls acting on the roller v 28, and rotatingcontinuously, will produce the desired continued reciprocation of thebar. *Inthe bottom wall oi the groove 20 there are formed thedepressions 39 within which are disposed the ball bearing-s40 forsupporting the bar 14, and permitting. the same a free sliding movement.

actuating the bar, the base havmg transverse channels communicating withits groove, and plates adjustably mounted in -.ber in the casing havinggroove therein, a longitudinallyi' slidable the channelsand havingbearing. rollers disposed to contact respectively with the oppositesides of thebar. 3

2. A device or the. class described" prisirg an oil-tight'cas'mgarotatin'g meman endless cam member, a roller carried by the *slidable 1member engaging in the cam groove, *supports for the rotatin memberextending over the slidable mem r for retaimng the latter agalnst upwardmovement, a pin carried by the. slidable member, fand bufiers .situatedat the ends ofthe casingv for engagement respectively by' one end ofthereciprocating sliding member andthe said prising a casing havin a,rotatable member mounted therein an ing it, said. member'havin'g a camroove, a a

3. A device of-the class described com-u having means jex tendedexteriorly of the casing for rotat;-

rmounted for reciprocation in t e casing and extending exteriorlythereoiimeans carried by the bar and engaged inthe' cam groove forreciprocation of thesbar 'from the latter, roller guides disposed at"opposite sides of andin contact with the bar. and

yieldable .stops for the bar disposed vfor operation at oppositereciprocatory strokes of the bar. 1

In, testimony whereof, I fi'ix ture, in the presence of two witnesses.

' CHARLESv HOVER. Witnesses:

M. M. Pn'rnns, O. G. SHEPHERD.

my signa adjustable toward and away from it, and

